On the total absorption cross-section of galaxies - II: The case of λ cosmologies and covering factor variation
In this work we expand the previous discussion of the plausibility of hypothesis of origin of the Lyα forest absorption systems in haloes of normal galaxies in connection with the HubbleDeepField (HDF) data. It is shown that simplistic approach to absorption cross-sections of galaxies with...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Astronomical Observatory, Department of Astronomy, Belgrade
1998-01-01
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| Series: | Serbian Astronomical Journal |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/1450-698X/1998/1450-698X9858003C.pdf |
| _version_ | 1818903653255217152 |
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| author | Ćirković M.M. Samurović S. |
| author_facet | Ćirković M.M. Samurović S. |
| author_sort | Ćirković M.M. |
| collection | DOAJ |
| description | In this work we expand the previous discussion of the plausibility of
hypothesis of origin of the Lyα forest absorption systems in haloes of normal
galaxies in connection with the HubbleDeepField (HDF) data. It is shown that
simplistic approach to absorption cross-sections of galaxies with no
luminosity scaling is in strong violation of empirical statistics up to
redshift of z ∼ 3.5. Realistic variation of the covering factor in order to
account for its increase in the inner parts of observed haloes leads to even
bigger discrepancy. Cosmologies with finite cosmological constant are briefly
discussed and compared to Λ = 0 case. Ways to improve agreement with
observational data are indicated. This problem is highly illustrative of the
basic tenets of modern observational cosmology. |
| first_indexed | 2024-12-19T20:54:58Z |
| format | Article |
| id | doaj.art-60237ae9a8f74aa8bfcc3318ab638b3a |
| institution | Directory Open Access Journal |
| issn | 1450-698X 1820-9289 |
| language | English |
| last_indexed | 2024-12-19T20:54:58Z |
| publishDate | 1998-01-01 |
| publisher | Astronomical Observatory, Department of Astronomy, Belgrade |
| record_format | Article |
| series | Serbian Astronomical Journal |
| spelling | doaj.art-60237ae9a8f74aa8bfcc3318ab638b3a2022-12-21T20:06:00ZengAstronomical Observatory, Department of Astronomy, BelgradeSerbian Astronomical Journal1450-698X1820-92891998-01-0119981583710.2298/SAJ9858003C1450-698X9858003COn the total absorption cross-section of galaxies - II: The case of λ cosmologies and covering factor variationĆirković M.M.0Samurović S.1Astronomical Observatory, Belgrade + Department of Physics & Astronomy, S.U.N.Y. at Stony Brook, Stony Brook, NY, USAPublic Observatory, Gornji Grad, BelgradeIn this work we expand the previous discussion of the plausibility of hypothesis of origin of the Lyα forest absorption systems in haloes of normal galaxies in connection with the HubbleDeepField (HDF) data. It is shown that simplistic approach to absorption cross-sections of galaxies with no luminosity scaling is in strong violation of empirical statistics up to redshift of z ∼ 3.5. Realistic variation of the covering factor in order to account for its increase in the inner parts of observed haloes leads to even bigger discrepancy. Cosmologies with finite cosmological constant are briefly discussed and compared to Λ = 0 case. Ways to improve agreement with observational data are indicated. This problem is highly illustrative of the basic tenets of modern observational cosmology.http://www.doiserbia.nb.rs/img/doi/1450-698X/1998/1450-698X9858003C.pdf |
| spellingShingle | Ćirković M.M. Samurović S. On the total absorption cross-section of galaxies - II: The case of λ cosmologies and covering factor variation Serbian Astronomical Journal |
| title | On the total absorption cross-section of galaxies - II: The case of λ cosmologies and covering factor variation |
| title_full | On the total absorption cross-section of galaxies - II: The case of λ cosmologies and covering factor variation |
| title_fullStr | On the total absorption cross-section of galaxies - II: The case of λ cosmologies and covering factor variation |
| title_full_unstemmed | On the total absorption cross-section of galaxies - II: The case of λ cosmologies and covering factor variation |
| title_short | On the total absorption cross-section of galaxies - II: The case of λ cosmologies and covering factor variation |
| title_sort | on the total absorption cross section of galaxies ii the case of λ cosmologies and covering factor variation |
| url | http://www.doiserbia.nb.rs/img/doi/1450-698X/1998/1450-698X9858003C.pdf |
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